diff --git a/mercurial/thirdparty/zope/interface/__init__.py b/mercurial/thirdparty/zope/interface/__init__.py
--- a/mercurial/thirdparty/zope/interface/__init__.py
+++ b/mercurial/thirdparty/zope/interface/__init__.py
@@ -48,42 +48,45 @@
 
 See the module doc strings for more information.
 """
+
+from __future__ import absolute_import
+
 __docformat__ = 'restructuredtext'
 
-from zope.interface.interface import Interface
-from zope.interface.interface import _wire
+from .interface import Interface
+from .interface import _wire
 
 # Need to actually get the interface elements to implement the right interfaces
 _wire()
 del _wire
 
-from zope.interface.declarations import Declaration
-from zope.interface.declarations import alsoProvides
-from zope.interface.declarations import classImplements
-from zope.interface.declarations import classImplementsOnly
-from zope.interface.declarations import classProvides
-from zope.interface.declarations import directlyProvidedBy
-from zope.interface.declarations import directlyProvides
-from zope.interface.declarations import implementedBy
-from zope.interface.declarations import implementer
-from zope.interface.declarations import implementer_only
-from zope.interface.declarations import implements
-from zope.interface.declarations import implementsOnly
-from zope.interface.declarations import moduleProvides
-from zope.interface.declarations import named
-from zope.interface.declarations import noLongerProvides
-from zope.interface.declarations import providedBy
-from zope.interface.declarations import provider
-from zope.interface.exceptions import Invalid
-from zope.interface.interface import Attribute
-from zope.interface.interface import invariant
-from zope.interface.interface import taggedValue
+from .declarations import Declaration
+from .declarations import alsoProvides
+from .declarations import classImplements
+from .declarations import classImplementsOnly
+from .declarations import classProvides
+from .declarations import directlyProvidedBy
+from .declarations import directlyProvides
+from .declarations import implementedBy
+from .declarations import implementer
+from .declarations import implementer_only
+from .declarations import implements
+from .declarations import implementsOnly
+from .declarations import moduleProvides
+from .declarations import named
+from .declarations import noLongerProvides
+from .declarations import providedBy
+from .declarations import provider
+from .exceptions import Invalid
+from .interface import Attribute
+from .interface import invariant
+from .interface import taggedValue
 
 # The following are to make spec pickles cleaner
-from zope.interface.declarations import Provides
+from .declarations import Provides
 
 
-from zope.interface.interfaces import IInterfaceDeclaration
+from .interfaces import IInterfaceDeclaration
 
 moduleProvides(IInterfaceDeclaration)
 
diff --git a/mercurial/thirdparty/zope/interface/_compat.py b/mercurial/thirdparty/zope/interface/_compat.py
--- a/mercurial/thirdparty/zope/interface/_compat.py
+++ b/mercurial/thirdparty/zope/interface/_compat.py
@@ -13,6 +13,8 @@
 ##############################################################################
 """Basic components support
 """
+from __future__ import absolute_import
+
 import sys
 import types
 
diff --git a/mercurial/thirdparty/zope/interface/_flatten.py b/mercurial/thirdparty/zope/interface/_flatten.py
--- a/mercurial/thirdparty/zope/interface/_flatten.py
+++ b/mercurial/thirdparty/zope/interface/_flatten.py
@@ -15,7 +15,10 @@
 
 See Adapter class.
 """
-from zope.interface import Declaration
+
+from __future__ import absolute_import
+
+from .interface import Declaration
 
 def _flatten(implements, include_None=0):
 
diff --git a/mercurial/thirdparty/zope/interface/_zope_interface_coptimizations.c b/mercurial/thirdparty/zope/interface/_zope_interface_coptimizations.c
--- a/mercurial/thirdparty/zope/interface/_zope_interface_coptimizations.c
+++ b/mercurial/thirdparty/zope/interface/_zope_interface_coptimizations.c
@@ -47,7 +47,8 @@
 {
   PyObject *declarations, *i;
 
-  declarations = PyImport_ImportModule("zope.interface.declarations");
+  declarations = PyImport_ImportModule(
+    "mercurial.thirdparty.zope.interface.declarations");
   if (declarations == NULL)
     return -1;
 
@@ -1336,7 +1337,7 @@
 static void
 verifying_dealloc(verify *self)
 {
-  PyObject_GC_UnTrack((PyObject *)self);   	
+  PyObject_GC_UnTrack((PyObject *)self);
   verifying_clear(self);
   Py_TYPE(self)->tp_free((PyObject*)self);
 }
diff --git a/mercurial/thirdparty/zope/interface/adapter.py b/mercurial/thirdparty/zope/interface/adapter.py
--- a/mercurial/thirdparty/zope/interface/adapter.py
+++ b/mercurial/thirdparty/zope/interface/adapter.py
@@ -13,16 +13,18 @@
 ##############################################################################
 """Adapter management
 """
+from __future__ import absolute_import
+
 import weakref
 
-from zope.interface import implementer
-from zope.interface import providedBy
-from zope.interface import Interface
-from zope.interface import ro
-from zope.interface.interfaces import IAdapterRegistry
+from . import implementer
+from . import providedBy
+from . import Interface
+from . import ro
+from .interfaces import IAdapterRegistry
 
-from zope.interface._compat import _normalize_name
-from zope.interface._compat import STRING_TYPES
+from ._compat import _normalize_name
+from ._compat import STRING_TYPES
 
 _BLANK = u''
 
@@ -409,7 +411,7 @@
 LookupBasePy = LookupBaseFallback # BBB
 
 try:
-    from zope.interface._zope_interface_coptimizations import LookupBase
+    from ._zope_interface_coptimizations import LookupBase
 except ImportError:
     LookupBase = LookupBaseFallback
 
@@ -445,7 +447,7 @@
 VerifyingBasePy = VerifyingBaseFallback #BBB
 
 try:
-    from zope.interface._zope_interface_coptimizations import VerifyingBase
+    from ._zope_interface_coptimizations import VerifyingBase
 except ImportError:
     VerifyingBase = VerifyingBaseFallback
 
diff --git a/mercurial/thirdparty/zope/interface/advice.py b/mercurial/thirdparty/zope/interface/advice.py
--- a/mercurial/thirdparty/zope/interface/advice.py
+++ b/mercurial/thirdparty/zope/interface/advice.py
@@ -25,6 +25,8 @@
 Visit the PEAK home page at http://peak.telecommunity.com for more information.
 """
 
+from __future__ import absolute_import
+
 from types import FunctionType
 try:
     from types import ClassType
diff --git a/mercurial/thirdparty/zope/interface/common/idatetime.py b/mercurial/thirdparty/zope/interface/common/idatetime.py
--- a/mercurial/thirdparty/zope/interface/common/idatetime.py
+++ b/mercurial/thirdparty/zope/interface/common/idatetime.py
@@ -1,7 +1,7 @@
 ##############################################################################
 # Copyright (c) 2002 Zope Foundation and Contributors.
 # All Rights Reserved.
-# 
+#
 # This software is subject to the provisions of the Zope Public License,
 # Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
 # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
@@ -15,8 +15,10 @@
 of the real datetime would fail.
 """
 
-from zope.interface import Interface, Attribute
-from zope.interface import classImplements
+from __future__ import absolute_import
+
+from .. import Interface, Attribute
+from .. import classImplements
 
 from datetime import timedelta, date, datetime, time, tzinfo
 
@@ -112,7 +114,7 @@
 
         Except for those members given new values by whichever keyword
         arguments are specified. For example, if d == date(2002, 12, 31), then
-        d.replace(day=26) == date(2000, 12, 26). 
+        d.replace(day=26) == date(2000, 12, 26).
         """
 
     def timetuple():
@@ -232,7 +234,7 @@
         """Return the current UTC date and time, with tzinfo None.
 
         This is like now(), but returns the current UTC date and time, as a
-        naive datetime object. 
+        naive datetime object.
 
         See also now().
         """
@@ -357,7 +359,7 @@
         If you merely want to attach a time zone object tz to a datetime dt
         without adjustment of date and time members, use dt.replace(tzinfo=tz).
         If you merely want to remove the time zone object from an aware
-        datetime dt without conversion of date and time members, use 
+        datetime dt without conversion of date and time members, use
         dt.replace(tzinfo=None).
 
         Note that the default tzinfo.fromutc() method can be overridden in a
diff --git a/mercurial/thirdparty/zope/interface/common/interfaces.py b/mercurial/thirdparty/zope/interface/common/interfaces.py
--- a/mercurial/thirdparty/zope/interface/common/interfaces.py
+++ b/mercurial/thirdparty/zope/interface/common/interfaces.py
@@ -13,8 +13,11 @@
 ##############################################################################
 """Interfaces for standard python exceptions
 """
-from zope.interface import Interface
-from zope.interface import classImplements
+
+from __future__ import absolute_import
+
+from .. import Interface
+from .. import classImplements
 
 class IException(Interface): pass
 class IStandardError(IException): pass
diff --git a/mercurial/thirdparty/zope/interface/common/mapping.py b/mercurial/thirdparty/zope/interface/common/mapping.py
--- a/mercurial/thirdparty/zope/interface/common/mapping.py
+++ b/mercurial/thirdparty/zope/interface/common/mapping.py
@@ -13,7 +13,10 @@
 ##############################################################################
 """Mapping Interfaces
 """
-from zope.interface import Interface
+
+from __future__ import absolute_import
+
+from .. import Interface
 
 class IItemMapping(Interface):
     """Simplest readable mapping object
@@ -42,13 +45,13 @@
 
 class IWriteMapping(Interface):
     """Mapping methods for changing data"""
-    
+
     def __delitem__(key):
         """Delete a value from the mapping using the key."""
 
     def __setitem__(key, value):
         """Set a new item in the mapping."""
-        
+
 
 class IEnumerableMapping(IReadMapping):
     """Mapping objects whose items can be enumerated.
@@ -89,32 +92,32 @@
         "iterate over items"
 
 class IClonableMapping(Interface):
-    
+
     def copy():
         "return copy of dict"
 
 class IExtendedReadMapping(IIterableMapping):
-    
+
     def has_key(key):
         """Tell if a key exists in the mapping; equivalent to __contains__"""
 
 class IExtendedWriteMapping(IWriteMapping):
-    
+
     def clear():
         "delete all items"
-    
+
     def update(d):
         " Update D from E: for k in E.keys(): D[k] = E[k]"
-    
+
     def setdefault(key, default=None):
         "D.setdefault(k[,d]) -> D.get(k,d), also set D[k]=d if k not in D"
-    
+
     def pop(k, *args):
         """remove specified key and return the corresponding value
         *args may contain a single default value, or may not be supplied.
-        If key is not found, default is returned if given, otherwise 
+        If key is not found, default is returned if given, otherwise
         KeyError is raised"""
-    
+
     def popitem():
         """remove and return some (key, value) pair as a
         2-tuple; but raise KeyError if mapping is empty"""
diff --git a/mercurial/thirdparty/zope/interface/common/sequence.py b/mercurial/thirdparty/zope/interface/common/sequence.py
--- a/mercurial/thirdparty/zope/interface/common/sequence.py
+++ b/mercurial/thirdparty/zope/interface/common/sequence.py
@@ -13,8 +13,11 @@
 ##############################################################################
 """Sequence Interfaces
 """
+
+from __future__ import absolute_import
+
 __docformat__ = 'restructuredtext'
-from zope.interface import Interface
+from .. import Interface
 
 class IMinimalSequence(Interface):
     """Most basic sequence interface.
diff --git a/mercurial/thirdparty/zope/interface/declarations.py b/mercurial/thirdparty/zope/interface/declarations.py
--- a/mercurial/thirdparty/zope/interface/declarations.py
+++ b/mercurial/thirdparty/zope/interface/declarations.py
@@ -24,6 +24,8 @@
     provided by objects.
 
 """
+from __future__ import absolute_import
+
 __docformat__ = 'restructuredtext'
 
 import sys
@@ -32,12 +34,12 @@
 from types import ModuleType
 import weakref
 
-from zope.interface.advice import addClassAdvisor
-from zope.interface.interface import InterfaceClass
-from zope.interface.interface import SpecificationBase
-from zope.interface.interface import Specification
-from zope.interface._compat import CLASS_TYPES as DescriptorAwareMetaClasses
-from zope.interface._compat import PYTHON3
+from .advice import addClassAdvisor
+from .interface import InterfaceClass
+from .interface import SpecificationBase
+from .interface import Specification
+from ._compat import CLASS_TYPES as DescriptorAwareMetaClasses
+from ._compat import PYTHON3
 
 # Registry of class-implementation specifications
 BuiltinImplementationSpecifications = {}
@@ -638,11 +640,11 @@
 
 # Try to get C base:
 try:
-    import zope.interface._zope_interface_coptimizations
+    from . import _zope_interface_coptimizations
 except ImportError:
     pass
 else:
-    from zope.interface._zope_interface_coptimizations import ClassProvidesBase
+    from ._zope_interface_coptimizations import ClassProvidesBase
 
 
 class ClassProvides(Declaration, ClassProvidesBase):
@@ -915,15 +917,15 @@
 _empty = Declaration()
 
 try:
-    import zope.interface._zope_interface_coptimizations
+    from . import _zope_interface_coptimizations
 except ImportError:
     pass
 else:
-    from zope.interface._zope_interface_coptimizations import implementedBy
-    from zope.interface._zope_interface_coptimizations import providedBy
-    from zope.interface._zope_interface_coptimizations import (
+    from ._zope_interface_coptimizations import implementedBy
+    from ._zope_interface_coptimizations import providedBy
+    from ._zope_interface_coptimizations import (
         getObjectSpecification)
-    from zope.interface._zope_interface_coptimizations import (
+    from ._zope_interface_coptimizations import (
         ObjectSpecificationDescriptor)
 
 objectSpecificationDescriptor = ObjectSpecificationDescriptor()
diff --git a/mercurial/thirdparty/zope/interface/document.py b/mercurial/thirdparty/zope/interface/document.py
--- a/mercurial/thirdparty/zope/interface/document.py
+++ b/mercurial/thirdparty/zope/interface/document.py
@@ -16,8 +16,10 @@
 This module provides a function, asStructuredText, for rendering an
 interface as structured text.
 """
-import zope.interface
 
+from __future__ import absolute_import
+
+from . import Interface
 
 def asStructuredText(I, munge=0, rst=False):
     """ Output structured text format.  Note, this will whack any existing
@@ -41,7 +43,7 @@
 
     bases = [base
              for base in I.__bases__
-             if base is not zope.interface.Interface
+             if base is not Interface
              ]
     if bases:
         outp(_justify_and_indent("This interface extends:", level, munge))
diff --git a/mercurial/thirdparty/zope/interface/exceptions.py b/mercurial/thirdparty/zope/interface/exceptions.py
--- a/mercurial/thirdparty/zope/interface/exceptions.py
+++ b/mercurial/thirdparty/zope/interface/exceptions.py
@@ -14,6 +14,8 @@
 """Interface-specific exceptions
 """
 
+from __future__ import absolute_import
+
 class Invalid(Exception):
     """A specification is violated
     """
diff --git a/mercurial/thirdparty/zope/interface/interface.py b/mercurial/thirdparty/zope/interface/interface.py
--- a/mercurial/thirdparty/zope/interface/interface.py
+++ b/mercurial/thirdparty/zope/interface/interface.py
@@ -13,7 +13,7 @@
 ##############################################################################
 """Interface object implementation
 """
-from __future__ import generators
+from __future__ import absolute_import, generators
 
 import sys
 from types import MethodType
@@ -21,8 +21,8 @@
 import warnings
 import weakref
 
-from zope.interface.exceptions import Invalid
-from zope.interface.ro import ro
+from .exceptions import Invalid
+from .ro import ro
 
 
 CO_VARARGS = 4
@@ -114,7 +114,7 @@
 
 SpecificationBase = SpecificationBasePy
 try:
-    from zope.interface._zope_interface_coptimizations import SpecificationBase
+    from ._zope_interface_coptimizations import SpecificationBase
 except ImportError:
     pass
 
@@ -155,14 +155,14 @@
 
 InterfaceBase = InterfaceBasePy
 try:
-    from zope.interface._zope_interface_coptimizations import InterfaceBase
+    from ._zope_interface_coptimizations import InterfaceBase
 except ImportError:
     pass
 
 
 adapter_hooks = []
 try:
-    from zope.interface._zope_interface_coptimizations import adapter_hooks
+    from ._zope_interface_coptimizations import adapter_hooks
 except ImportError:
     pass
 
@@ -665,22 +665,22 @@
 
 # Now we can create the interesting interfaces and wire them up:
 def _wire():
-    from zope.interface.declarations import classImplements
+    from .declarations import classImplements
 
-    from zope.interface.interfaces import IAttribute
+    from .interfaces import IAttribute
     classImplements(Attribute, IAttribute)
 
-    from zope.interface.interfaces import IMethod
+    from .interfaces import IMethod
     classImplements(Method, IMethod)
 
-    from zope.interface.interfaces import IInterface
+    from .interfaces import IInterface
     classImplements(InterfaceClass, IInterface)
 
-    from zope.interface.interfaces import ISpecification
+    from .interfaces import ISpecification
     classImplements(Specification, ISpecification)
 
 # We import this here to deal with module dependencies.
-from zope.interface.declarations import implementedBy
-from zope.interface.declarations import providedBy
-from zope.interface.exceptions import InvalidInterface
-from zope.interface.exceptions import BrokenImplementation
+from .declarations import implementedBy
+from .declarations import providedBy
+from .exceptions import InvalidInterface
+from .exceptions import BrokenImplementation
diff --git a/mercurial/thirdparty/zope/interface/interfaces.py b/mercurial/thirdparty/zope/interface/interfaces.py
--- a/mercurial/thirdparty/zope/interface/interfaces.py
+++ b/mercurial/thirdparty/zope/interface/interfaces.py
@@ -13,11 +13,14 @@
 ##############################################################################
 """Interface Package Interfaces
 """
+
+from __future__ import absolute_import
+
 __docformat__ = 'restructuredtext'
 
-from zope.interface.interface import Attribute
-from zope.interface.interface import Interface
-from zope.interface.declarations import implementer
+from .interface import Attribute
+from .interface import Interface
+from .declarations import implementer
 
 
 _BLANK = u''
@@ -447,10 +450,10 @@
         Instances of ``C`` provide only ``I1``, ``I2``, and regardless of
         whatever interfaces instances of ``A`` and ``B`` implement.
         """
-        
+
     def implementer_only(*interfaces):
-        """Create a decorator for declaring the only interfaces implemented 
-        
+        """Create a decorator for declaring the only interfaces implemented
+
         A callable is returned that makes an implements declaration on
         objects passed to it.
         """
diff --git a/mercurial/thirdparty/zope/interface/registry.py b/mercurial/thirdparty/zope/interface/registry.py
--- a/mercurial/thirdparty/zope/interface/registry.py
+++ b/mercurial/thirdparty/zope/interface/registry.py
@@ -13,31 +13,34 @@
 ##############################################################################
 """Basic components support
 """
+
+from __future__ import absolute_import
+
 from collections import defaultdict
 
 try:
-    from zope.event import notify
+    from ..event import notify
 except ImportError: # pragma: no cover
     def notify(*arg, **kw): pass
 
-from zope.interface.interfaces import ISpecification
-from zope.interface.interfaces import ComponentLookupError
-from zope.interface.interfaces import IAdapterRegistration
-from zope.interface.interfaces import IComponents
-from zope.interface.interfaces import IHandlerRegistration
-from zope.interface.interfaces import ISubscriptionAdapterRegistration
-from zope.interface.interfaces import IUtilityRegistration
-from zope.interface.interfaces import Registered
-from zope.interface.interfaces import Unregistered
+from .interfaces import ISpecification
+from .interfaces import ComponentLookupError
+from .interfaces import IAdapterRegistration
+from .interfaces import IComponents
+from .interfaces import IHandlerRegistration
+from .interfaces import ISubscriptionAdapterRegistration
+from .interfaces import IUtilityRegistration
+from .interfaces import Registered
+from .interfaces import Unregistered
 
-from zope.interface.interface import Interface
-from zope.interface.declarations import implementedBy
-from zope.interface.declarations import implementer
-from zope.interface.declarations import implementer_only
-from zope.interface.declarations import providedBy
-from zope.interface.adapter import AdapterRegistry
-from zope.interface._compat import CLASS_TYPES
-from zope.interface._compat import STRING_TYPES
+from .interface import Interface
+from .declarations import implementedBy
+from .declarations import implementer
+from .declarations import implementer_only
+from .declarations import providedBy
+from .adapter import AdapterRegistry
+from ._compat import CLASS_TYPES
+from ._compat import STRING_TYPES
 
 
 class _UnhashableComponentCounter(object):
diff --git a/mercurial/thirdparty/zope/interface/ro.py b/mercurial/thirdparty/zope/interface/ro.py
--- a/mercurial/thirdparty/zope/interface/ro.py
+++ b/mercurial/thirdparty/zope/interface/ro.py
@@ -13,6 +13,9 @@
 ##############################################################################
 """Compute a resolution order for an object and its bases
 """
+
+from __future__ import absolute_import
+
 __docformat__ = 'restructuredtext'
 
 def _mergeOrderings(orderings):
diff --git a/mercurial/thirdparty/zope/interface/verify.py b/mercurial/thirdparty/zope/interface/verify.py
--- a/mercurial/thirdparty/zope/interface/verify.py
+++ b/mercurial/thirdparty/zope/interface/verify.py
@@ -13,10 +13,12 @@
 ##############################################################################
 """Verify interface implementations
 """
-from zope.interface.exceptions import BrokenImplementation, DoesNotImplement
-from zope.interface.exceptions import BrokenMethodImplementation
+from __future__ import absolute_import
+
+from .exceptions import BrokenImplementation, DoesNotImplement
+from .exceptions import BrokenMethodImplementation
 from types import FunctionType, MethodType
-from zope.interface.interface import fromMethod, fromFunction, Method
+from .interface import fromMethod, fromFunction, Method
 import sys
 
 # This will be monkey-patched when running under Zope 2, so leave this